Question

find value of k 3x+y=7
(a-b)x+(a+b)y=3a+b-2​

Answer 1

Answer:

(2k-1)x+(k-1)×(1-3x) = 2k +1

2kx-x+(k-3kx-1+3x)=0

=2kx - x +k-3kx-1+3x=0

= - kx+2x +k -1=0

k(x+1)+2x-1=0

k(x+1)=1-2x

k=1-2x/x+1